Add same-net trace combining phase

[Iineman2]

/claim #34
/claim #29

Summary

• add a post-cleanup SameNetTraceCombiningSolver phase to the schematic trace pipeline
• snap only close overlapping internal same-net horizontal/vertical segments onto a shared run
• preserve pin endpoint segments and reject snaps that would intersect different-net traces
• also covers the same-X/same-Y close same-net merge case from Merge same-net trace lines that are close together (make at the same Y or same X) #34; example34 passes with this pipeline phase

Verification

• npx --yes bun test tests/solvers/SameNetTraceCombiningSolver/SameNetTraceCombiningSolver.test.ts
• npx --yes bun test tests/examples/example29.test.ts
• npx --yes bun test tests/examples/example30.test.ts
• npx --yes bun test tests/examples/example34.test.ts
• npx --yes bun run build
• npx --yes biome format lib/solvers/SameNetTraceCombiningSolver/SameNetTraceCombiningSolver.ts lib/solvers/SchematicTracePipelineSolver/SchematicTracePipelineSolver.ts tests/solvers/SameNetTraceCombiningSolver/SameNetTraceCombiningSolver.test.ts
• git diff --check

Note: bun run format:check currently reports repo-wide CRLF formatting drift in many pre-existing files, so I verified formatting on the changed files directly.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 11, 2026 4:00pm

[Iineman2]

Format check is green after e8b0679. Current PR checks are all passing: test, type-check, format-check, and Vercel.

[Iineman2]

Added durable before/after visual proof for the #34 surface from the SVG snapshots:

• Before PR Add same-net trace combining phase #303: https://github.com/Iineman2/schematic-trace-solver/releases/download/tscircuit-303-visual-proof/example34-before.svg
• After PR Add same-net trace combining phase #303: https://github.com/Iineman2/schematic-trace-solver/releases/download/tscircuit-303-visual-proof/example34-after.svg
• Short side-by-side demo video: https://github.com/Iineman2/schematic-trace-solver/releases/download/tscircuit-303-visual-proof/example34-before-after-demo.mp4

The files compare origin/main against the current PR head for tests/examples/example34.test.ts, alongside the focused SameNetTraceCombiningSolver regression tests already in the branch.

[Iineman2]

Added a small extra coverage pass after the visual proof: the focused solver suite now also checks vertical same-net snapping and verifies that the merge-distance / minimum-overlap thresholds leave non-qualifying same-net segments unchanged.

Verification after the update:

• npx --yes bun test tests/examples/example29.test.ts tests/examples/example30.test.ts tests/examples/example34.test.ts tests/solvers/SameNetTraceCombiningSolver/SameNetTraceCombiningSolver.test.ts
• CI is green again: test, format-check, type-check, and Vercel.

[Iineman2]

Quick review-ready status update for maintainers: PR #303 is still green across test, type-check, format-check, and Vercel after the extra solver coverage. The branch has focused proof for both claimed surfaces (#29 and #34), including before/after visual assets and the demo video linked above. Happy to trim or tune the merge thresholds if you want a narrower acceptance window.